| Jun 24, 2026 | Misquita Rodrigues | 0–1 | Kumar | Round 5: Misquita Rodrigues, Raul - Kumar, Sachin | Sicilian Defense: Alapin Variation | |
| Jun 24, 2026 | Oyalood | ½–½ | Kumar | Round 4: Oyalood, O Aathiran - Kumar, Sachin | Bird Opening | |
| Jun 23, 2026 | Xue | 1–0 | Kumar | 2026 English Schools Chess Championships Final | Sicilian Defense: Closed, Traditional | |
| Jun 23, 2026 | Kumar | 0–1 | Chen | Round 1: Kumar, Sachin - Chen, Ching Lun | Pirc Defense | |
| Jun 22, 2026 | Poluru | ½–½ | Kumar | Round 5: Poluru, Mohanaditya - Kumar, Sachin | Sicilian Defense: Delayed Alapin Variation, with e6 | |
| Jun 22, 2026 | Misra | ½–½ | Kumar | Round 2: Misra, Anay - Kumar, Sachin | Sicilian Defense: Closed | |
| Jun 19, 2026 | Kumar | ½–½ | Shankar | Round 4: Kumar, Sachin - Shankar, Yashwardhan | Caro-Kann Defense: Exchange Variation | |
| Jun 19, 2026 | Kumar | 1–0 | Levitin | Round 3: Kumar, Sachin - Levitin, Mark | French Defense: Steinitz Variation | |
| Jun 19, 2026 | Kumar | 1–0 | Knight | Round 1: Kumar, Sachin - Knight, Hugo | Italian Game: Classical Variation | |
| Mar 2, 2025 | Goh | 1–0 | Kumar | Round 11: Goh, Jinghan Cameron - Kumar, Sachin | King's Indian Attack: Double Fianchetto | |
| Mar 2, 2025 | Kumar | 0–1 | Mokhber-Garcia | Round 8: Kumar, Sachin - Mokhber-Garcia, Sebastian | Italian Game: Two Knights Defense, Modern Bishop's Opening | |
| Mar 2, 2025 | Kumar | 1–0 | Hng | Round 10: Kumar, Sachin - Hng, Mei-Xian Eunice | Pirc Defense: Kholmov System | |
| Mar 2, 2025 | Bisnar | 0–1 | Kumar | Round 7: Bisnar, Paul - Kumar, Sachin | Grünfeld Defense: Exchange Variation, Modern Exchange Variation | |
| Mar 2, 2025 | Brocklehurst | ½–½ | Kumar | Round 9: Brocklehurst, Andrew - Kumar, Sachin | Sicilian Defense: Kveinis Variation | |
| Mar 1, 2025 | Kumar | 1–0 | Pileggi | Round 2: Kumar, Sachin - Pileggi, Cesar | French Defense: Steinitz Variation | |
| Mar 1, 2025 | Kumar | 1–0 | Caira | Round 4: Kumar, Sachin - Caira, Theodore | Pirc Defense: Classical Variation | |
| Mar 1, 2025 | Kumar | 1–0 | Ziu | Round 6: Kumar, Sachin - Ziu, Naman | Italian Game: Classical Variation, Giuoco Pianissimo, with d6 | |
| Mar 1, 2025 | Mikalajunas | 1–0 | Kumar | Round 1: Mikalajunas, Kajus - Kumar, Sachin | Zukertort Opening: Reversed Grünfeld | |
| Mar 1, 2025 | Nicholas | 1–0 | Kumar | Round 3: Nicholas, Koichi B - Kumar, Sachin | Rapport-Jobava System | |
| Mar 1, 2025 | McCarthy | 1–0 | Kumar | Round 5: McCarthy, Kevin C - Kumar, Sachin | Queen's Pawn Game: Barry Attack | |
| Sep 9, 2023 | Kumar | 0–1 | Garuda | 2023 UK Chess Challenge Terafinal Challengers U10 | Italian Game: Classical Variation | |
| Sep 9, 2023 | Kumar | ½–½ | Helsby | 2023 UK Chess Challenge Terafinal Challengers U10 | Caro-Kann Defense: Exchange Variation | |
| Sep 9, 2023 | Kumar | 0–1 | Shi | 2023 UK Chess Challenge Terafinal Challengers U10 | Italian Game: Classical Variation, Giuoco Pianissimo | |
| Nov 13, 2021 | Kumar | * | Ren | British Junior Rapidplay: Open Under 8 | ? | |
| Nov 13, 2021 | Zhao | 1–0 | Kumar | British Junior Rapidplay: Open Under 8 | Queen's Gambit Declined | |
| Nov 13, 2021 | Litvin | 0–1 | Kumar | British Junior Rapidplay: Open Under 8 | Italian Game: Giuoco Pianissimo | |
| — | Kumar | 0–1 | Kennedy | British Junior Rapidplay: Open Under 8 | Italian Game: Two Knights Defense, Modern Bishop's Opening | |
| — | Kumar | 1–0 | Sasikumar | British Junior Rapidplay: Open Under 8 | Caro-Kann Defense | |
| — | Kumar | 1–0 | Lishoy Gengis Paratazham | British Junior Rapidplay: Open Under 8 | Petrov's Defense: Stafford Gambit | |
| — | Kumar | 0–1 | Chen | British Junior Rapidplay: Open Under 8 | Sicilian Defense: Old Sicilian | |
| — | Gao | 1–0 | Kumar | British Junior Rapidplay: Open Under 8 | Italian Game: Classical Variation, Greco Gambit, Main Line | |
| — | Pradhan | 0–1 | Kumar | British Junior Rapidplay: Open Under 8 | Italian Game: Classical Variation, Greco Gambit, Traditional Line | |
